Rivet-setting machine



Patented July 12, 1927.

u rEosTAIEs EDWIN B. s'rnvrrsori, F BROOKLYN, NEW YoRK, ASSIGNOR COMPANY; or BROOKLYN, NEW YoRK.

TO EDWIN B. smnvrrson RIVET-SETTING MACHINE.

Application filed January 12, 1926. Serial no. 80,721.

This invention relates to machines for setting rivets or the like and is of the same general type as the machine disclosed in my Patent No. 1,480,577.

The object of the present invention is to provide a machine capable of setting rivets through the periphery of a drum-shaped article with the heads of the rivets on the interior of the drum. In the past, whenever it was desired to secure material to the inner peripheral wall of a drum-shaped member, as in fastening lining inside a brake drum, it was necessary to set the rivets from the exterior of the drum, leaving the heads on the exterior and the forked prongs on the interior of the casing. In some instances it is more desirable to have the smooth heads on the interior, and the machine described herein is capable of setting rivets in such position.

While I have disclosed a preferred em bodiment of the machine for purposes of illustration, it should be understood that the structure may be modified in various ways without departure from the true spirit and scope of the invention as hereinafter defined and claimed.

In the accompanying drawings:

Fig. 1 is an elevation of a rivet-setting machine embodying my invention, only such parts being illustrated as are necessary to an understanding of the invention.

Fig. 2 is a view similar to Fig. 1, but taken at right angles thereto.

Fig. 3 is a fragmentary sectional view showing a rivet set by the machine disclosed herein.

Referring more particularly to the drawings, the number is a drum for feeding rivets down the inclined raceway 11 to the movable holding pocket 12. As these parts all operate in the manner set forth in my patent above referred to, their operation will not be detailed here. The pocket 12 is carried by an arm 13 mounted on a sleeve 1%1 which slides upon a vertical guide rod 15 secured to a suitable part of the machine. In its upper position the pocket contacts with the lower end of the raceway and is set to receive a rivet from the raceway. The

pocket is resiliently held in its upper position by two springs 16 which have their lower ends attached to arm 13 and their upper ends attached to a suitable part of the machine.

The plunger 17 which rivets, has an offset U-shaped portion 18 to fit around the drum 19, as clearly shown in Fig. 1. The plunger slides in a suitably shaped guideway and is operated in a wellknown manner.

The device operates in the following manner:

A drum 19 with the lining 20 in place is held on the anvil 21, as shown in the drawings. The machine is then operated, and the plunger descends, moving the pocket 12 downward and forcing the rivet through the resilient holding pocket and through the work, spreading the prongs against the anvil. As the plunger rises the springs 16 return the pocket to its upper position.

The pocket 12 is mounted in the offset position, as shown, in order to clear the rim of the drum 19, and by attaching springs 16 near the outer end of arm 13 the downward pressure of the plunger is partly balanced thereby reducing side on rod 15.

What I claim is:

1. In a riveting machine, an anvil, a plunger for driving rivets against said anpressure of sleeve 14 vil, said plunger having an offset portion permitting the drivinghead of the plunger to extend within a drum-like member and operate upon the inner surface of the side wall of said member.

2. In a riveting machine, an anvil, an offset plunger for driving rivets, a movable pocket mounted in offset relation to said anvil, and mechanism for feeding rivets to said pocket.

3. In a riveting machine, an anvil, a drivin plunger having a U-shaped offset, a 1nov-- able pocket mounted in offset relation to said anvil, and mechanism for feeding riv ets to said pocket. .7

4. In a riveting machine, an anvil, a driv ing plunger having a lateral offset, a slidable pocket mounted in offset relation to said andrives and sets the V CII vil, a raceway for feeding rivets to said pocket, said pocket being resiliently held in position to receive rivets from said raceway.

5. In a riveting machine, an anvil for receiving a drum-like member, a plunger ofiset to extend within said drum-like member and means for feeding rivets to said plunger.

6. In a riveting machine, an anvil for receiving a'drum-like member, a plunger offset to extend Within said drum-like member, a sliding pocket extending into said drumlike member, and means for feeding rivets to said plunger.

In testimony whereof I affix my signature.

EDWVIN B. STIMPSON. 

